Powderer



Oct. 3, 1933.

s. LIPSIUS 1,929,200

POWDERER Filed Nov. 24, 1930 s Sheets-Sheet 1 46 5 INVENT? S. LIPSIUS Oct. 3, 1933.

POWDERER 3 Sheets-Sheet 2 Filed Nov. 24, 1930 s. LIPSIUS POWDERER Filed Nov. 24, 1930 3 Sheets-Sheet 3 V 25 7' preferred .4 Fig.3 is a Patented ocea, 1933 t t V POWDEBER I Samuel Ups'ius, New York N, Y.

" Application November 24,1930 Serial era-497,110

My invention mography or commonly termed embossed or raised printing, and particularly .tomachines Ior automatically applying powder to the printed .5 she -L.) X1 I One object is to provide apparatus of a simple and compact form capable of rapidly, applying powder to "previously printed sheets and completely removing the excess powder from theIunprintedportions 01 the sheet.

Another object is to Provide means for automatieally applying powder andautomatically to the feeding .means such powder as returning the printed portions of i the has'not adhered to 1; sheet}, I .Another object is to provide effective means for regulating the deposit of powder on the sheets.

Another object is to provide means for effectively removing excess powder-from the printed he t 11 1 'Another object is to provide convenient means for inspecting the interiorv jofthe machine.

Qther'ob'jects will be apparent from the follow MEMiflcations;

theuse of a housing I containing. a suitable horizontal travelling conveyor for the printed sheets,

5 a-hopper arranged aboveone endof the conveyor provided with means Ior automatically depositing 39 suitable .powdeni e Elation blower arranged above the conveyor for blowi'ngthe' excess powder fror'rizthe sheets and sucking up the powder in the air, means for collecting' the excesspowder beneath the conveyor 85 and elevatingmeans the powder which has been collected beneath the conveyor. I

Details-of one form of construction ,and arrangement will be understood from the accompenyingdrawings. ,1 i i Fig. l is a side view of .a machineembodying one form of the invention, I V; r p Fig. 2 is a front and partial section of the machine.

ing a detail of the'elevator mechanism.

Fig. 4 isa'planviewofthe principal portions 1 merit...

of the' machine.

I Fig. 5. is a longitudinal sectional view of the v machine The casing or hood 7 may be of any suitable construction and themesh work conveyor v8 is suitably mounted anddriven as is customary in machines of this character.

- The=hopper 9 is mounted above the conveyor form the contemplates.

means for vibrating the sheets,

for'returning to the hopper horizontal sectionand plan show- Thesize of the opening and I may be adjusted bymeans of the'members 2 1 9 relates to the subject of ther atone end ofthe machine and ada'pted'to' dethe sheet'son the conveyor posit powder upon as they pass through the machine.-

A tapered collecting receptacle 10 is mounted beneath the conveyor for collecting the powder which does not pESSOllhOtthGjliahing This collecting member has its'lower end arranged at one side of the/machine, and a bucket-type eler vator 11 isprovided for picking up the"powder from thebottom of the collector and discharging it'into an" inclined chute IZYwhicIileadsb' g;t f?

the top of the hopper 9. Y r h The removal of.excess powder is accomplished by a suction blower 13, driven by'a motor 14. To the'pressure outlet of the blower-is connected a pipe or conduit l5,'having airoutlets 15, 'ar ranged immediately above the upper run'o'f the conveyor. A vibrator 16 is arranged adjacent "the air vents for vibrating the conveyor andthe sheets supported on it so as to loosen the powder and permit the air blasts to remove the last vestige of unattached powden The blower 13" has its suction inlet 13'1" arranged in the hood above the conveyor so a s;to remove the particles'of powder which are in the air above" the conveyor. A centrifugal'or cyclone type separator 1'7 may also .be connected to the pressure outlet or the blower as an auxiliary, pressure relief. A n'ai'r bag or dust collector might be used hojweverin place of thisseparator. s 1

{.A motor 20 furnishesthenecessary' power for driving the various'moving. parts other than the blower, for'instance, by belts such as belt 21 which drives the conveyor 8. l5

I The hopper 9 has its sides and between themare located a sliding'plate 22. andavibrat ingjplate 23. .Theplate 22 isadpatedto beadjusted up and down by a screw threaded rod and thumb nut 24, andis held yieldingly in place by. an adjustable spring" devi ce 25; The 'discharge opening may be varied to permit ajgreater or lesser quantity of powder f to escape in a given time'byl providing an arrangement whereby the plate..2 3 may be adjusted toward andj from the lower; edge ofthe' plate 2 2by means ofasc're'w and thumb. nut 26, which may have an indicator the position of adjust or pointer f2f7 for showing A toothed or ribbed shait 28 co-a'cts with the lower edge of the flexible or resilient plate '23 and is driven'lby a belt space between: the plates'22 and 23 by avibrating. action, thus sifting the powder uponthe sheets. the vibrating action 28. to open and-closethe 1,

- powder.

and 26. The hopper may be provided with a filler. opening having a removable cap 29.

Access to the collector 10 may be had through a side opening having a cover or cap 30.

Access to the hood above the conveyor 8 may be had through an opening which is closed by a hinged cover 31. 7

Powder barriers 7' and '7" are arranged above the conveyor belt 8 extending between the sides of the casing 7 on either sidev of and parallel with the toothed shaft 28 to prevent the falling powder from being drawn directly into the casing 7 or spilling out from the front of the machine.

The cleaning pipe 15 extends across from o'ne' side of the machine to the other and is supplied with air. under pressure from the blowerby one or more pipes 32. 1 Vibrator 16 is very desirable when thework to be done requires largequantities of powder. on-

some portions of the sheet, in such cases'there is a very great excess of powder on the-unprinted portions of the sheets and this tends to pile up sheets after they pass the pipe 15. t

vibrator '16 has been found to provide'a very eflective method of loosening the powder and permitting the air blast to remove the excess In order to provide sufficient suction to, remove the flying particles of powderffrom the hood, it is necessary to use a suction blower having a blowing capacity greater than .is required for the Y blowing action through the pipe 15. I there fore provide thecyclone type of separator 17 which islconnected by a pipel34 to the outlet of the blower 13. This separator 17 has a col? with such devices. V 'To avoid having any floating particles of powder fall upon the conveyor or sheets beyond the blbwerpipe 15 I- provide a tray 40 which has one edge supported on the pipe 15 and the upper edge 41 supported near the suction inlet 13this tray collects the powder which is not sucked up by .the suction blower or'deposited in infront of the air blastand swirl back on tothe v exiting device 35 atthe. lower end and an airrelief outlet 36 at the 'upperfend, as is customary 40 the collector. ,F'rom time 'to time this tray is removed and emptied. V

As. a further precaution to remove any excess particles which. may still remain on thesheets r providean inclined delivery shelf 42 with an opening 42', this opening fisjcovered by a suitable plate -13 which is vibrated by a rotating beater 44 so that the excess powder drops off as the I sheets are delivered. to the oven (not shown) which is. usually arranged to receivethe sheets from thepowde'rer. l J

The collectorlo is preferablyprovidedwith a basin portion 45 which is detachably'secured in place so asto make'it convenient to get at the elevator .11. A detachable plug 46 facilitates the removal, of powder ironrthe lower end of vthe basin. The elevator'runs on two'shafts; 47- at jthe top and 4s atthe bottom." The shaft 48 at, the bottom is preferably entirely enclosed and has bearings"49inside the basin45 so that 'thereare no openings for the exit of powder at thispoint. The front 50'of the elevator shaft is preferably removable and maybe raised and lowered by means of a handle member 51" s o that the entire front maybe removed to permit access to the conveyor buckets. T

The upper shaft is supported inoutside bearings 52 and driven by a belt 53 which is conhopper 9 where it may be distributed toward the ends of the hopper by the screw threaded shaft 9' so'as to maintain a substantially uniform spread of powder.

By the construction herein shown and described it is possible to regulate the deposit of powder to accommodate small cards as well as large sheets. It is also possible to handle various types of powder in the same machine and to adjust the machine to accommodate different hygroscopic conditions. ;:'It-will be obvious that the speed of the suction blower may also be adjusted to take care of varying conditions and requirements.

There 'is' practically no waste of powder and t e, action is such that the powderdoes not materially change in composition while the machine is in operation. This feature though not appar-' ent is quite important since the powder, of course,

consists of particles of various sizes audit is important that the relativeproportions of these various sizes shall not materially be changed, otherwise the quality of the work produced will 1 t I'claim: V t 1. In a powdering machine, a foraminous conveyor for carryingg slreets, a gravity'feedingjhopp'er above saidconveyor'jmeans for mechanically vibrating said sheets for looseningthepowder thereon, means for' blowing a blast' of air over said sheets simultaneously with the vibration thereof and atthepoint where the sheets are vibratedfor removing the loosened excess powder, a suction blower having itssuction end positioned above the conveyor forcarry'in'g away the floating particles of powder, a-gravity collector'b'eneath saidconveyor and an elevatorforf returning the excess powder in said collector said feeding hopper. t

2. In a powdering machine, a conveyor'foFcai rying sheets, a gravity feeding hopper abovesaid conveyor, a guard. plate on each side of the hopperdischarge opening and across the conveyor for-preventing spreading of the powder from the I feeding hopper, means for loosening the powder on the sheets including means for vibrating the conveyor and means for blowing a blast'of air over said sheets, adjacent the point where the conveyor is vibrated for removing the loosened excess powder, a suction blower having its suction end positioned above the'conveyor for carrying away thefloating particles of powder, agravity collector beneath said conveyor and anelevator for returning the excess to said feeding hopper; V

3. In a powdering machine, a foraminous conveyor for carrying sheets, a gravity feeding hopper above said conveyonrneans for vibrating said sheets for loosening 'the powder thereon, means for blowing a blastof air over said sheets simultaneously withthe vibration thereof for removin. said collector to said feeding hopper and a separator connected to the outlet of the suction blower for relieving excess pressure from said blower.

4. In a powde ring machine, a conveyor'for carpowder in'said collector ry ns said conveyor, means for removing excess powder,

sheets, a gravity feeding hopperabove said means including a perforated pipe across and above the conveyor, a suction blower having its suction end positioned above the conveyor for carrying away the floating particles of powder,

a gravitycollector beneath said conveyor, an

elevator for returning the excess powder in said collector to said feeding hopper and a removable SAMUEL LIPSIUS. 

